No no no...
Read carefully, the flexi pay plan is absolutely zero interest, no admin charge, no handling fee.

I believe you must charge the insurance policy to your CIMB CC first; meaning pay large sum to the insurance company.

Once the transaction appears in your statement, call CS to convert it to Smart Flexi Pay.

Same method goes to i.pay plan.

I believe CIMB/DA smart flexi plan is not equal to the 0% EPP.
A person has to call/sms to convert the transaction (insurance/education/hospital) to 10 months interest-free installment after the transaction posted.
The full amount of the transaction is billed but later on got offset (debit) by the same amount after the conversion. The transaction doesn't need special terminal like EPP needed.
CIMB is absorbing the potential return from smart flexi plan but they are "hoping" a credit card user not able to settle monthly installment in full.

What are you referring to is the installment programme created from the partnership between participating merchants and the bank. That's why it requires bank terminal and during the swipe, the cashier needs to select for easy payment plan/installment plan from the terminal itself.

Whereas, their another type of installment programme offered by the bank and you can convert any general swipe of large sum amount (subjected to min amount) into installment plan of certain period with one-time fee (like CIMB i.pay plan and CIMB SmartFlexi Pay) or low interest (like Maybank EasyPay Plus).

What is the method of payment if card member opted to use flexi pay plan ? Pay online via Insuance Co's web site or CIMB's web site or must go to insurance company cashier counter to tell you want to flexi pay ?
The method of transaction is not restricted. You can opt to swipe over the counter, or submit the appropriate form (consult your insurance agent) to the insurance company. When the transaction is posted, you may call the Card Centre and say you want convert the transaction (in this case, INSURANCE) into a flexi pay plan.

All Insurance companies accept CIMB flexi pay ?
As long as the insurance company accepts CIMB credit card, you may wish to apply for its flexi pay plan.

My insurance premium is paid annually. Kinda burdening when it is due and we are not yet ready for it.
Luckily CIMB CC offers flexi pay plan to relieve my cash flow.  
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For easy reference, here's the clipping.
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if let say i hv monthly income of rm2k (pay slip from company), plus rental income of rm1k, how are we going to prove the bank i hv rm3k of income every month?